[INFO] cloning repository https://github.com/urawa72/rustlings-answers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/urawa72/rustlings-answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Furawa72%2Frustlings-answers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Furawa72%2Frustlings-answers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b3817d327200f768f1a32e2bfb44396e74be6ea
[INFO] checking urawa72/rustlings-answers against try#50d7e48beb74b48bd17c3749bfb73843c9ae0166 for pr-151102
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Furawa72%2Frustlings-answers" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/urawa72/rustlings-answers
[INFO] finished tweaking git repo https://github.com/urawa72/rustlings-answers
[INFO] tweaked toml for git repo https://github.com/urawa72/rustlings-answers written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/urawa72/rustlings-answers on toolchain 50d7e48beb74b48bd17c3749bfb73843c9ae0166
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50d7e48beb74b48bd17c3749bfb73843c9ae0166" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/urawa72/rustlings-answers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50d7e48beb74b48bd17c3749bfb73843c9ae0166" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indicatif v0.10.3
[INFO] [stderr]   Downloaded console v0.7.7
[INFO] [stderr]   Downloaded clicolors-control v1.0.1
[INFO] [stderr]   Downloaded number_prefix v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+50d7e48beb74b48bd17c3749bfb73843c9ae0166" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b5c4dd6286f708b3e310729480e920cde046c4931351f8e71aa01a273412330
[INFO] running `Command { std: "docker" "start" "-a" "1b5c4dd6286f708b3e310729480e920cde046c4931351f8e71aa01a273412330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b5c4dd6286f708b3e310729480e920cde046c4931351f8e71aa01a273412330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b5c4dd6286f708b3e310729480e920cde046c4931351f8e71aa01a273412330", kill_on_drop: false }`
[INFO] [stdout] 1b5c4dd6286f708b3e310729480e920cde046c4931351f8e71aa01a273412330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+50d7e48beb74b48bd17c3749bfb73843c9ae0166" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f20ee0731c24bce664ba122e57c7b150a2e017794dce68c9b3aab011ea960ec9
[INFO] running `Command { std: "docker" "start" "-a" "f20ee0731c24bce664ba122e57c7b150a2e017794dce68c9b3aab011ea960ec9", kill_on_drop: false }`
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking termios v0.3.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking serde_json v1.0.66
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking indicatif v0.10.3
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]     Checking rustlings v4.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Progress` is never used
[INFO] [stdout]   --> exercises/standard_library_types/iterators5.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Progress {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_for` is never used
[INFO] [stdout]   --> exercises/standard_library_types/iterators5.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn count_for(map: &HashMap<String, Progress>, value: Progress) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_iterator` is never used
[INFO] [stdout]   --> exercises/standard_library_types/iterators5.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn count_iterator(map: &HashMap<String, Progress>, value: Progress) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_collection_for` is never used
[INFO] [stdout]   --> exercises/standard_library_types/iterators5.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn count_collection_for(collection: &[HashMap<String, Progress>], value: Progress) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_collection_iterator` is never used
[INFO] [stdout]   --> exercises/standard_library_types/iterators5.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn count_collection_iterator(collection: &[HashMap<String, Progress>], value: Progress) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking escargot v0.4.0
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/exercise.rs:109:20
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
[INFO] [stdout]     |                    ^^^^^            ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise<'_>, ExerciseOutput> {
[INFO] [stdout]     |                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/exercise.rs:109:20
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
[INFO] [stdout]     |                    ^^^^^            ^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn compile(&self) -> Result<CompiledExercise<'_>, ExerciseOutput> {
[INFO] [stdout]     |                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.06s
[INFO] running `Command { std: "docker" "inspect" "f20ee0731c24bce664ba122e57c7b150a2e017794dce68c9b3aab011ea960ec9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f20ee0731c24bce664ba122e57c7b150a2e017794dce68c9b3aab011ea960ec9", kill_on_drop: false }`
[INFO] [stdout] f20ee0731c24bce664ba122e57c7b150a2e017794dce68c9b3aab011ea960ec9
